def parseRoman(self):
self.numerals = []
#check for subtractions by creating with pairs at each index
for numPairs in numeral.Numeral.listValidSubtractions:
splitLetters = self.roman.split(sep=numPairs, maxsplit=1)
if len(splitLetters) > 1:
self.numerals.append(numeral.Numeral(numPairs))
self.roman = ''.join(splitLetters)
#Now that subs are removed, add the remaining numerals
for l in self.roman:
self.numerals.append(numeral.Numeral(l))
#sort them, so they should appear in C, XC, X... descending order
self.numerals.sort(reverse=True)
def checkSingleSubtraction(self):
iiIndex = self.roman.find('II')
xxIndex = self.roman.find('XX')
ccIndex = self.roman.find('CC')
checkPassed = True
if iiIndex > -1:
checkPassed = self.checkFollowingNumeralsLessThanEqual(
iiIndex, numeral.Numeral('I'))
if xxIndex > -1 and checkPassed:
checkPassed = self.checkFollowingNumeralsLessThanEqual(
xxIndex, numeral.Numeral('X'))
if ccIndex > -1 and checkPassed:
checkPassed = self.checkFollowingNumeralsLessThanEqual(
ccIndex, numeral.Numeral('C'))
return checkPassed
def checkFiveBasedSubtraction(self):
checkPassed = True
fiveBasedNumbers = ['V', 'L', 'D']
for num in fiveBasedNumbers:
index = self.roman.find(num)
if index > -1:
checkPassed = self.checkFollowingNumeralsLessThan(
index, numeral.Numeral(num))
return checkPassed
def generateRomanNumerals(self):
self.roman = ''
self.numerals = []
remainingNumber = self.arabic
listDescendingNumerals = [
'M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV',
'I'
]
#Go get the largest numeral/subtraction pair, and subtract it from the temp
while remainingNumber > 0:
for num in listDescendingNumerals:
if remainingNumber >= numeral.Numeral.dictNumeralValues[num]:
self.numerals.append(numeral.Numeral(num))
remainingNumber -= numeral.Numeral.dictNumeralValues[num]
break
for num in self.numerals:
self.roman += num.letter
def setUp(self):
self.numeral = numeral.Numeral('D')
def setUp(self):
self.numeral_ = numeral.Numeral('I')
def checkFollowingNumeralsLessThan(self, startIndex, numer):
for letter in self.roman[startIndex + 1:]:
num = numeral.Numeral(letter)
if num.value >= numer.value:
return False
return True